{"cik":783325,"taxonomy":"us-gaap","tag":"LongTermDebtNoncurrent","label":"Long-term Debt, Excluding Current Maturities","description":"Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","entityName":"WEC ENERGY GROUP, INC.","units":{"USD":[{"end":"2008-12-31","val":4074700000,"accn":"0000107815-09-000047","fy":2009,"fp":"Q2","form":"10-Q","filed":"2009-08-04"},{"end":"2008-12-31","val":4074700000,"accn":"0000107815-09-000062","fy":2009,"fp":"Q3","form":"10-Q","filed":"2009-10-30"},{"end":"2008-12-31","val":4074700000,"accn":"0000107815-10-000046","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-26","frame":"CY2008Q4I"},{"end":"2009-06-30","val":3820100000,"accn":"0000107815-09-000047","fy":2009,"fp":"Q2","form":"10-Q","filed":"2009-08-04","frame":"CY2009Q2I"},{"end":"2009-09-30","val":3631200000,"accn":"0000107815-09-000062","fy":2009,"fp":"Q3","form":"10-Q","filed":"2009-10-30","frame":"CY2009Q3I"},{"end":"2009-12-31","val":3875800000,"accn":"0000107815-10-000046","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-26"},{"end":"2009-12-31","val":3875800000,"accn":"0000107815-10-000062","fy":2010,"fp":"Q1","form":"10-Q","filed":"2010-05-06"},{"end":"2009-12-31","val":3875800000,"accn":"0000107815-10-000077","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-07-30"},{"end":"2009-12-31","val":3875800000,"accn":"0000107815-10-000098","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-27"},{"end":"2009-12-31","val":3875800000,"accn":"0000107815-11-000028","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25","frame":"CY2009Q4I"},{"end":"2010-03-31","val":4396100000,"accn":"0000107815-10-000062","fy":2010,"fp":"Q1","form":"10-Q","filed":"2010-05-06","frame":"CY2010Q1I"},{"end":"2010-06-30","val":3942600000,"accn":"0000107815-10-000077","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-07-30","frame":"CY2010Q2I"},{"end":"2010-09-30","val":3935700000,"accn":"0000107815-10-000098","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-27","frame":"CY2010Q3I"},{"end":"2010-12-31","val":3932000000,"accn":"0000107815-11-000028","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25"},{"end":"2010-12-31","val":3932000000,"accn":"0000107815-11-000052","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05"},{"end":"2010-12-31","val":3932000000,"accn":"0000107815-11-000081","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-02"},{"end":"2010-12-31","val":3932000000,"accn":"0000107815-11-000107","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-01"},{"end":"2010-12-31","val":3932000000,"accn":"0000107815-12-000039","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010Q4I"},{"end":"2011-03-31","val":4339100000,"accn":"0000107815-11-000052","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-05","frame":"CY2011Q1I"},{"end":"2011-06-30","val":4334600000,"accn":"0000107815-11-000081","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-02","frame":"CY2011Q2I"},{"end":"2011-09-30","val":4618900000,"accn":"0000107815-11-000107","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-01","frame":"CY2011Q3I"},{"end":"2011-12-31","val":4614300000,"accn":"0000107815-12-000039","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28"},{"end":"2011-12-31","val":4614300000,"accn":"0000107815-12-000071","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":4614300000,"accn":"0000107815-12-000108","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":4614300000,"accn":"0000107815-12-000132","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-02"},{"end":"2011-12-31","val":4614300000,"accn":"0000107815-13-000055","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-27","frame":"CY2011Q4I"},{"end":"2012-03-31","val":4602800000,"accn":"0000107815-12-000071","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":4297500000,"accn":"0000107815-12-000108","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":4240600000,"accn":"0000107815-12-000132","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-02","frame":"CY2012Q3I"},{"end":"2012-12-31","val":4453800000,"accn":"0000107815-13-000055","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-27"},{"end":"2012-12-31","val":4453800000,"accn":"0000107815-13-000080","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":4453800000,"accn":"0000107815-13-000112","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":4453800000,"accn":"0000107815-13-000133","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-01"},{"end":"2012-12-31","val":4453800000,"accn":"0000107815-14-000041","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-27","frame":"CY2012Q4I"},{"end":"2013-03-31","val":4441000000,"accn":"0000107815-13-000080","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":4383200000,"accn":"0000107815-13-000112","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":4370900000,"accn":"0000107815-13-000133","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-01","frame":"CY2013Q3I"},{"end":"2013-12-31","val":4363200000,"accn":"0000107815-14-000041","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-27"},{"end":"2013-12-31","val":4363200000,"accn":"0000107815-14-000057","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":4363200000,"accn":"0000107815-14-000080","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"end":"2013-12-31","val":4363200000,"accn":"0000107815-14-000103","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-31"},{"end":"2013-12-31","val":4363200000,"accn":"0000107815-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2013Q4I"},{"end":"2014-03-31","val":4348800000,"accn":"0000107815-14-000057","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02","frame":"CY2014Q1I"},{"end":"2014-06-30","val":4587500000,"accn":"0000107815-14-000080","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01","frame":"CY2014Q2I"},{"end":"2014-09-30","val":4569600000,"accn":"0000107815-14-000103","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-31","frame":"CY2014Q3I"},{"end":"2014-12-31","val":4186400000,"accn":"0000107815-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27"},{"end":"2014-12-31","val":4186400000,"accn":"0000107815-15-000058","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"end":"2014-12-31","val":4186400000,"accn":"0000107815-15-000104","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-05"},{"end":"2014-12-31","val":4186400000,"accn":"0000107815-15-000130","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-06"},{"end":"2014-12-31","val":4170700000,"accn":"0000107815-16-000248","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2014Q4I"},{"end":"2015-03-31","val":4169200000,"accn":"0000107815-15-000058","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1I"},{"end":"2015-06-30","val":8547600000,"accn":"0000107815-15-000104","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-05","frame":"CY2015Q2I"},{"end":"2015-09-30","val":8727000000,"accn":"0000107815-15-000130","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-06","frame":"CY2015Q3I"},{"end":"2015-12-31","val":9124100000,"accn":"0000107815-16-000248","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26"},{"end":"2015-12-31","val":9124100000,"accn":"0000107815-16-000306","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-06"},{"end":"2015-12-31","val":9124100000,"accn":"0000107815-16-000386","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-05"},{"end":"2015-12-31","val":9124100000,"accn":"0000107815-16-000459","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-04"},{"end":"2015-12-31","val":9124100000,"accn":"0000107815-17-000104","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2015Q4I"},{"end":"2016-03-31","val":8955800000,"accn":"0000107815-16-000306","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-06","frame":"CY2016Q1I"},{"end":"2016-06-30","val":8902100000,"accn":"0000107815-16-000386","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-05","frame":"CY2016Q2I"},{"end":"2016-09-30","val":9088100000,"accn":"0000107815-16-000459","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-04","frame":"CY2016Q3I"},{"end":"2016-12-31","val":9158200000,"accn":"0000107815-17-000104","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"end":"2016-12-31","val":9158200000,"accn":"0000107815-17-000154","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-05"},{"end":"2016-12-31","val":9158200000,"accn":"0000107815-17-000210","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-04"},{"end":"2016-12-31","val":9158200000,"accn":"0000107815-17-000262","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-03"},{"end":"2016-12-31","val":9158200000,"accn":"0000107815-18-000134","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2016Q4I"},{"end":"2017-03-31","val":9143600000,"accn":"0000107815-17-000154","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-05","frame":"CY2017Q1I"},{"end":"2017-06-30","val":8799700000,"accn":"0000107815-17-000210","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-04","frame":"CY2017Q2I"},{"end":"2017-09-30","val":8785800000,"accn":"0000107815-17-000262","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-03","frame":"CY2017Q3I"},{"end":"2017-12-31","val":8746600000,"accn":"0000107815-18-000134","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28"},{"end":"2017-12-31","val":8746600000,"accn":"0000107815-18-000185","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-04"},{"end":"2017-12-31","val":8746600000,"accn":"0000107815-18-000243","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03"},{"end":"2017-12-31","val":8746600000,"accn":"0000107815-18-000280","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-02","frame":"CY2017Q4I"},{"end":"2018-03-31","val":8617500000,"accn":"0000107815-18-000185","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-04","frame":"CY2018Q1I"},{"end":"2018-06-30","val":9209300000,"accn":"0000107815-18-000243","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-03","frame":"CY2018Q2I"},{"end":"2018-09-30","val":9119000000,"accn":"0000107815-18-000280","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-02","frame":"CY2018Q3I"},{"end":"2018-12-31","val":9994000000,"accn":"0000107815-19-000181","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-03"},{"end":"2018-12-31","val":9994000000,"accn":"0000107815-19-000240","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-06"},{"end":"2018-12-31","val":9994000000,"accn":"0000107815-19-000304","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"end":"2018-12-31","val":9975600000,"accn":"0000107815-20-000089","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-27","frame":"CY2018Q4I"},{"end":"2019-03-31","val":10326700000,"accn":"0000107815-19-000181","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-03","frame":"CY2019Q1I"},{"end":"2019-06-30","val":9921000000,"accn":"0000107815-19-000240","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-06","frame":"CY2019Q2I"},{"end":"2019-09-30","val":10897300000,"accn":"0000107815-19-000304","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07","frame":"CY2019Q3I"},{"end":"2019-12-31","val":11171400000,"accn":"0000107815-20-000089","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-27"},{"end":"2019-12-31","val":11171400000,"accn":"0000107815-21-000079","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-25","frame":"CY2019Q4I"},{"end":"2020-12-31","val":11672800000,"accn":"0000107815-21-000079","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-25"},{"end":"2020-12-31","val":11672800000,"accn":"0000107815-22-000116","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-24","frame":"CY2020Q4I"},{"end":"2021-12-31","val":13472400000,"accn":"0000107815-22-000116","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-24"},{"end":"2021-12-31","val":13472400000,"accn":"0000107815-23-000100","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-23","frame":"CY2021Q4I"},{"end":"2022-12-31","val":14655700000,"accn":"0000107815-23-000100","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-23"},{"end":"2022-12-31","val":14655700000,"accn":"0000107815-24-000095","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-22","frame":"CY2022Q4I"},{"end":"2023-12-31","val":15366900000,"accn":"0000107815-24-000095","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-22"},{"end":"2023-12-31","val":15366900000,"accn":"0000107815-25-000103","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-21","frame":"CY2023Q4I"},{"end":"2024-12-31","val":17178100000,"accn":"0000107815-25-000103","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-21"},{"end":"2024-12-31","val":17178100000,"accn":"0000107815-25-000182","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-07"},{"end":"2024-12-31","val":17178100000,"accn":"0000783325-25-000030","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-01"},{"end":"2024-12-31","val":17178100000,"accn":"0000783325-25-000060","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-10-31"},{"end":"2024-12-31","val":17178100000,"accn":"0000783325-26-000018","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-20","frame":"CY2024Q4I"},{"end":"2025-03-31","val":16161800000,"accn":"0000107815-25-000182","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-07","frame":"CY2025Q1I"},{"end":"2025-06-30","val":17110400000,"accn":"0000783325-25-000030","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-01","frame":"CY2025Q2I"},{"end":"2025-09-30","val":17663300000,"accn":"0000783325-25-000060","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-10-31","frame":"CY2025Q3I"},{"end":"2025-12-31","val":18498100000,"accn":"0000783325-26-000018","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-20"},{"end":"2025-12-31","val":18498100000,"accn":"0000783325-26-000052","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-07"},{"end":"2025-12-31","val":18498100000,"accn":"0000783325-26-000087","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-04","frame":"CY2025Q4I"},{"end":"2026-03-31","val":19381800000,"accn":"0000783325-26-000052","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-07","frame":"CY2026Q1I"},{"end":"2026-06-30","val":19216300000,"accn":"0000783325-26-000087","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-04","frame":"CY2026Q2I"}]}}